A modification device for carbon black used in the production of high thermal conductivity rubber

Abstract

This utility model discloses a modification device for carbon black used in the production of high thermal conductivity rubber, relating to the field of carbon black production technology. The inlet of the reactor is connected via pipes to a carbon black tank and a composite modifier solution tank. The inlet of the composite modifier solution tank is connected via pipes to a silane coupling agent solution tank, a sodium alginate solution tank, an ammonium polyacrylate tank, a tea polyphenol tank, a polyethyleneimine tank, and a nano-alumina tank. The outlet of the reactor is connected via a pipe to a first filter. The solid phase outlet of the first filter is connected via a pipe to a first dryer. The outlet of the first dryer is connected via a pipe to a modified carbon black product tank. The modified carbon black can effectively improve the overall thermal conductivity of rubber.

Description

Technical Field

[0001] This utility model relates to the field of carbon black production technology, specifically to a modification device for carbon black used in the production of high thermal conductivity rubber. Background Technology

[0002] Rubber materials are widely used in electronics, aerospace, and automotive industries as sealing and vibration damping components due to their excellent elasticity, insulation, and sealing properties. However, traditional rubber has an extremely low thermal conductivity (typically 0.1-0.3 W / (m·K)), which severely hinders the timely dissipation of heat generated during operation, leading to overheating, performance degradation, or even failure of the device.

[0003] To improve the thermal conductivity of rubber, a common method is to add fillers such as carbon black. However, carbon black has poor interfacial compatibility with the organic rubber matrix, resulting in high interfacial thermal resistance. This makes it difficult to form an efficient continuous thermal conductivity network, and carbon black is prone to agglomeration and uneven dispersion during application, further reducing thermal conductivity. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a modification device for carbon black used in the production of high thermal conductivity rubber, which has high dispersibility, good interfacial compatibility with rubber matrix, and improves the thermal conductivity of rubber, in order to address the shortcomings of the existing technology.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0006] A modification device for carbon black used in the production of high thermal conductivity rubber includes a reaction vessel, the inlet of which is connected to a carbon black tank and a composite modifier solution tank via pipelines.

[0007] The inlet of the composite modifier solution tank is connected to a silane coupling agent solution tank, a sodium alginate solution tank, an ammonium polyacrylate tank, a tea polyphenol tank, a polyethyleneimine tank, and a nano alumina tank via pipelines.

[0008] The outlet of the reactor is connected to a first filter via a pipeline, the solid phase outlet of the first filter is connected to a first dryer via a pipeline, and the outlet of the first dryer is connected to a modified carbon black product tank via a pipeline.

[0009] As an improved technical solution, the inlet of the silane coupling agent solution tank is connected to the silane coupling agent tank, the first deionized water tank and the acetic acid tank through pipelines respectively.

[0010] The inlet of the sodium alginate solution tank is connected to the sodium alginate tank and the second deionized water tank via pipes.

[0011] As an improved technical solution, the solid phase outlet of the first filter is connected to a first washing tank via a pipeline, the inlet of the first washing tank is connected to a third deionized water tank via a pipeline, and the outlet of the first washing tank is connected to the first dryer via a pipeline.

[0012] As an improved technical solution, the outlet of the carbon black tank is connected to a dispersion tank via a pipeline, the inlet of the dispersion tank is connected to a fourth deionized water tank via a pipeline, the outlet of the dispersion tank is connected to a pretreatment tank via a pipeline, the inlet of the pretreatment tank is connected to a pomegranate peel extract solution tank and an H2O2 solution tank via pipelines, the outlet of the pretreatment tank is connected to a centrifuge via a pipeline, the solid phase outlet of the centrifuge is connected to the pretreatment carbon black tank via a pipeline, and the outlet of the pretreatment carbon black tank is connected to the reaction vessel via a pipeline.

[0013] As an improved technical solution, the solid phase outlet of the centrifuge is connected to a second dryer via a pipeline, and the outlet of the second dryer is connected to the pre-treated carbon black tank via a pipeline.

[0014] As an improved technical solution, the solid phase outlet of the centrifuge is connected to a second washing tank via a pipeline, the inlet of the second washing tank is connected to a fifth deionized water tank via a pipeline, and the outlet of the second washing tank is connected to the second dryer via a pipeline.

[0015] As a preferred technical solution, the inlet of the pomegranate peel extract solution tank is connected to a pomegranate peel powder tank and an ethanol aqueous solution tank via pipes, the outlet of the pomegranate peel extract solution tank is connected to a second filter via a pipe, the liquid phase outlet of the second filter is connected to a concentration tank via a pipe, and the outlet of the concentration tank is connected to the pretreatment tank via a pipe.

[0016] Due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0017] This utility model discloses a modification device for carbon black used in the production of high thermal conductivity rubber, comprising a reaction vessel. The inlet of the reaction vessel is connected to a carbon black tank and a composite modifier solution tank via pipelines. The inlet of the composite modifier solution tank is connected to a silane coupling agent solution tank, a sodium alginate solution tank, an ammonium polyacrylate tank, a tea polyphenol tank, a polyethyleneimine tank, and a nano-alumina tank via pipelines. The outlet of the reaction vessel is connected to a first filter via a pipeline. The solid phase outlet of the first filter is connected to a first dryer via a pipeline. The outlet of the first dryer is connected to a modified carbon black product tank via a pipeline. Silane coupling agents can form organic functional groups on the surface of carbon black, improving the interfacial compatibility between carbon black and the rubber matrix and reducing the "interfacial thermal resistance" caused by loose interfacial bonding. Polymer modifiers such as sodium alginate and ammonium polyacrylate can form a dispersion stabilizing layer on the surface of carbon black, preventing carbon black from agglomerating in the rubber matrix and ensuring uniform dispersion of carbon black to build a continuous thermal conductivity pathway. Furthermore, tea polyphenols and polyethyleneimine can combine with hydroxyl groups on the surface of carbon black through active groups, further enhancing the interfacial bonding force between carbon black and rubber and reducing heat loss at the interface. Most importantly, nano-alumina itself has excellent thermal conductivity. When it works synergistically with carbon black, it can fill the "thermal conductivity gaps" between carbon black particles, forming a multi-level thermal conductivity network of "carbon black-nano-alumina-rubber", significantly reducing heat transfer resistance and ultimately enabling the modified carbon black to effectively improve the overall thermal conductivity in rubber.

[0018] The inlet of the silane coupling agent solution tank of this invention is connected to a silane coupling agent tank, a first deionized water tank, and an acetic acid tank via pipes. The inlet of the sodium alginate solution tank is connected to a sodium alginate tank and a second deionized water tank via pipes. The first deionized water provides a hydrolysis medium for the silane coupling agent, while acetic acid can precisely adjust the pH of the solution to 4-5, significantly accelerating the hydrolysis reaction rate of the silane coupling agent and generating more hydrolysis products containing silanol groups. These hydrolysis products can undergo condensation reactions with the hydroxyl groups on the carbon black surface, forming a strong chemically bonded layer on the carbon black surface. At the same time, the fully hydrolyzed silane coupling agent can form a more uniform organic coating layer on the carbon black surface. This coating layer can effectively weaken the van der Waals forces between carbon black particles, preventing carbon black from agglomerating during rubber mixing and ensuring that the carbon black is dispersed in the form of single particles or small aggregates, thus providing a guarantee for constructing a continuous thermal conduction path.

[0019] The solid phase outlet of the first filter is connected to a first washing tank via a pipeline. The inlet of the first washing tank is connected to a third deionized water tank via a pipeline. The outlet of the first washing tank is connected to the first dryer via a pipeline. The third deionized water can thoroughly wash away residual impurities on the carbon black surface through penetration and dissolution. Furthermore, the deionized water is free of ion contamination and will not introduce new thermal resistance points on the carbon black surface. After washing and drying, the modified carbon black exhibits significantly improved interfacial compatibility with the rubber matrix, resulting in a substantial increase in thermal conductivity.

[0020] The outlet of the carbon black tank is connected to a dispersion tank via a pipeline. The inlet of the dispersion tank is connected to a fourth deionized water tank via a pipeline. The outlet of the dispersion tank is connected to a pretreatment tank via a pipeline. The inlet of the pretreatment tank is connected to a pomegranate peel extract solution tank and an H2O2 solution tank via pipelines. The outlet of the pretreatment tank is connected to a centrifuge via a pipeline. The solid phase outlet of the centrifuge is connected to the pretreatment carbon black tank via a pipeline. The outlet of the pretreatment carbon black tank is connected to the reaction vessel via a pipeline. The fourth deionized water in the dispersion tank allows the carbon black to first form a uniform aqueous suspension, breaking down the original agglomerates of the carbon black at the factory. The pre-dispersed carbon black particles have a more uniform particle size, providing structural support for the subsequent formation of a continuous heat conduction path. In the pretreatment tank, H2O2 acts as a strong oxidant, which can oxidize the carbon black surface to generate a large number of active functional groups such as hydroxyl and carboxyl groups. These functional groups can form hydrogen bonds with the polyphenolic active ingredients in pomegranate peel extract. The polyphenolic structure of pomegranate peel extract can not only further stabilize the dispersion state of carbon black, but also provide more binding sites for subsequent composite modifiers (such as silane coupling agents and polyethyleneimine), which greatly increases the loading of modifiers on the carbon black surface.

[0021] The solid phase outlet of the centrifuge is connected to a second washing tank via a pipeline. The inlet of the second washing tank is connected to a fifth deionized water tank via a pipeline, and the outlet of the second washing tank is connected to the second dryer via a pipeline. During the pretreatment process, unreacted pomegranate peel extract (polyphenols), excess H2O2, and oxidation byproducts (such as small molecule organic acids) may be adsorbed on the surface of the carbon black. If these residual substances enter the subsequent modification process with the carbon black, they will compete with the composite modifier for adsorption. The fifth deionized water can completely remove these residual substances through a second washing process without introducing new ionic contaminants. The subsequent secondary drying can remove the water adsorbed during the washing process, ensuring the reaction efficiency with the composite modifier.

[0022] The inlet of the pomegranate peel extract solution tank is connected to a pomegranate peel powder tank and an ethanol-water solution tank via pipes. The outlet of the pomegranate peel extract solution tank is connected to a second filter via a pipe. The liquid phase outlet of the second filter is connected to a concentration tank via a pipe. The outlet of the concentration tank is connected to the pretreatment tank via a pipe. The ethanol-water solution has excellent solubility for the polyphenolic active ingredients in the pomegranate peel powder, and can efficiently extract polyphenolic substances with dispersing and binding functions, providing a highly active modifying agent for pretreatment. Secondly, the second filter can remove pomegranate peel residue from the extract, preventing residue from entering the pretreatment tank with the extract. Finally, the concentration tank can increase the polyphenol concentration in the extract. The high-concentration polyphenol solution can form denser hydrogen bonds with the oxidized functional groups on the carbon black surface, further enhancing the dispersion stability of the carbon black, and providing more binding sites for subsequent composite modifiers. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0025] The components include: 1. Reactor; 2. Carbon black tank; 3. Composite modifier solution tank; 4. Silane coupling agent solution tank; 5. Sodium alginate solution tank; 6. Ammonium polyacrylate tank; 7. Tea polyphenol tank; 8. Polyethylene imine tank; 9. Nano alumina tank; 10. First filter; 11. First dryer; 12. Modified carbon black product tank; 13. Silane coupling agent tank; 14. First deionized water tank; 15. Acetic acid tank; 16. Second deionized water tank; 17. First washing... 18. Deionized water tank; 19. Dispersion tank; 20. Deionized water tank; 21. Pretreatment tank; 22. Pomegranate peel extract solution tank; 23. H2O2 solution tank; 24. Centrifuge; 25. Pretreatment carbon black tank; 26. Second dryer; 27. Second washing tank; 28. Fifth deionized water tank; 29. ​​Pomegranate peel powder tank; 30. Ethanol aqueous solution tank; 31. Second filter; 32. Concentration tank; 33. Sodium alginate tank. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] like Figure 1As shown, a modification device for carbon black used in the production of high thermal conductivity rubber includes a reaction vessel 1. The inlet of the reaction vessel 1 is connected to a carbon black tank 2 and a composite modifier solution tank 3 via pipelines. The inlet of the composite modifier solution tank 3 is connected to a silane coupling agent solution tank 4, a sodium alginate solution tank 5, an ammonium polyacrylate tank 6, a tea polyphenol tank 7, a polyethyleneimine tank 8, and a nano-alumina tank 9 via pipelines. The outlet of the reaction vessel 1 is connected to a first filter 10 via a pipeline. The solid phase outlet of the first filter 10 is connected to a first dryer 11 via a pipeline. The outlet of the first dryer 11 is connected to a modified carbon black product tank 12 via a pipeline. Silane coupling agents can form organic functional groups on the surface of carbon black, improving the interfacial compatibility between carbon black and the rubber matrix and reducing the "interfacial thermal resistance" caused by loose interfacial bonding. Polymer modifiers such as sodium alginate and ammonium polyacrylate can form a dispersion stabilizing layer on the surface of carbon black, preventing carbon black from agglomerating in the rubber matrix and ensuring uniform dispersion of carbon black to build a continuous thermal conductivity pathway. Furthermore, tea polyphenols and polyethyleneimine can combine with hydroxyl groups on the surface of carbon black through active groups, further enhancing the interfacial bonding force between carbon black and rubber and reducing heat loss at the interface. Most importantly, nano-alumina itself has excellent thermal conductivity. When it works synergistically with carbon black, it can fill the "thermal conductivity gaps" between carbon black particles, forming a multi-level thermal conductivity network of "carbon black-nano-alumina-rubber", significantly reducing heat transfer resistance and ultimately enabling the modified carbon black to effectively improve the overall thermal conductivity in rubber.

[0028] The inlet of the silane coupling agent solution tank 4 is connected via pipes to the silane coupling agent tank 13, the first deionized water tank 14, and the acetic acid tank 15. The inlet of the sodium alginate solution tank 5 is connected via pipes to the sodium alginate tank 33 and the second deionized water tank 16. The first deionized water provides a hydrolysis medium for the silane coupling agent, while acetic acid can precisely adjust the pH of the solution to 4-5, significantly accelerating the hydrolysis reaction rate of the silane coupling agent and generating more hydrolysis products containing silanol groups. These hydrolysis products can undergo condensation reactions with the hydroxyl groups on the carbon black surface, forming a strong chemically bonded layer on the carbon black surface. At the same time, the fully hydrolyzed silane coupling agent can form a more uniform organic coating layer on the carbon black surface. This coating layer can effectively weaken the van der Waals forces between carbon black particles, preventing carbon black from agglomerating during rubber mixing and ensuring that the carbon black is dispersed in the form of single particles or small aggregates, thus providing a guarantee for constructing a continuous thermal conduction path.

[0029] The solid phase outlet of the first filter 10 is connected to a first washing tank 17 via a pipeline. The inlet of the first washing tank 17 is connected to a third deionized water tank 18 via a pipeline. The outlet of the first washing tank 17 is connected to the first dryer 11 via a pipeline. The third deionized water can thoroughly wash away residual impurities on the carbon black surface through penetration and dissolution. Furthermore, the deionized water is free of ion contamination and will not introduce new thermal resistance points on the carbon black surface. After washing and drying, the interfacial compatibility between the modified carbon black and the rubber matrix is ​​significantly improved, and the thermal conductivity is greatly enhanced.

[0030] The outlet of the carbon black tank 2 is connected to a dispersion tank 19 via a pipe. The inlet of the dispersion tank 19 is connected to a fourth deionized water tank 20 via a pipe. The outlet of the dispersion tank 19 is connected to a pretreatment tank 21 via a pipe. The inlet of the pretreatment tank 21 is connected to a pomegranate peel extract solution tank 22 and an H2O2 solution tank 23 via pipes. The outlet of the pretreatment tank 21 is connected to a centrifuge 24 via a pipe. The solid phase outlet of the centrifuge 24 is connected to a pretreatment carbon black tank 25 via a pipe. The outlet of the pretreatment carbon black tank 25 is connected to the reaction vessel 1 via a pipe. The fourth deionized water in the dispersion tank 19 allows the carbon black to first form a uniform aqueous suspension, breaking down the original agglomerates of the carbon black at the factory. The pre-dispersed carbon black particles have a more uniform particle size, providing structural assurance for the subsequent formation of a continuous heat conduction path. In the pretreatment tank 21, H2O2 acts as a strong oxidant, which can oxidize the carbon black surface to generate a large number of active functional groups such as hydroxyl and carboxyl groups. These functional groups can form hydrogen bonds with the polyphenolic active ingredients in pomegranate peel extract. The polyphenolic structure of pomegranate peel extract can not only further stabilize the dispersion state of carbon black, but also provide more binding sites for subsequent composite modifiers (such as silane coupling agents and polyethyleneimine), thereby greatly increasing the loading of modifiers on the carbon black surface.

[0031] The solid phase outlet of the centrifuge 24 is connected to a second washing tank 27 via a pipeline. The inlet of the second washing tank 27 is connected to a fifth deionized water tank 28 via a pipeline. The outlet of the second washing tank 27 is connected to the second dryer 26 via a pipeline. During the pretreatment process, unreacted pomegranate peel extract (polyphenols), excess H2O2, and oxidation byproducts (such as small molecule organic acids) may be adsorbed on the surface of the carbon black. If these residual substances enter the subsequent modification process with the carbon black, they will compete with the composite modifier for adsorption. The fifth deionized water can completely remove these residual substances through a second washing process without introducing new ionic contaminants. The subsequent secondary drying can remove the water adsorbed during the washing process, ensuring the reaction efficiency with the composite modifier.

[0032] The inlet of the pomegranate peel extract solution tank 22 is connected to a pomegranate peel powder tank 29 and an ethanol-water solution tank 30 via pipes. The outlet of the pomegranate peel extract solution tank 22 is connected to a second filter 31 via a pipe. The liquid phase outlet of the second filter 31 is connected to a concentration tank 32 via a pipe. The outlet of the concentration tank 32 is connected to the pretreatment tank 21 via a pipe. The ethanol-water solution has excellent solubility for the polyphenolic active ingredients in the pomegranate peel powder, and can efficiently extract polyphenolic substances with dispersing and binding functions, providing a highly active modifying agent for pretreatment. Secondly, the second filter 31 can remove pomegranate peel residue in the extract, preventing residue from entering the pretreatment tank 21 with the extract. Finally, the concentration tank 32 can increase the polyphenol concentration in the extract. The high-concentration polyphenol solution can form denser hydrogen bonds with the oxidized functional groups on the carbon black surface, further enhancing the dispersion stability of the carbon black, and providing more binding sites for subsequent composite modifiers.

[0033] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

Claims

1. A modification device of carbon black for high thermal conductive rubber production, comprising a reaction kettle, characterized in that: The inlet of the reactor is connected to a carbon black tank and a composite modifier solution tank via pipelines. The inlet of the composite modifier solution tank is connected to a silane coupling agent solution tank, a sodium alginate solution tank, an ammonium polyacrylate tank, a tea polyphenol tank, a polyethyleneimine tank, and a nano alumina tank via pipelines. The outlet of the reactor is connected to a first filter via a pipeline, the solid phase outlet of the first filter is connected to a first dryer via a pipeline, and the outlet of the first dryer is connected to a modified carbon black product tank via a pipeline.

2. The modification device of carbon black for producing high thermal conductive rubber according to claim 1, characterized in that: The inlet of the silane coupling agent solution tank is connected to the silane coupling agent tank, the first deionized water tank and the acetic acid tank via pipelines. The inlet of the sodium alginate solution tank is connected to the sodium alginate tank and the second deionized water tank via pipes.

3. The modification device for carbon black used in the production of high thermal conductivity rubber as described in claim 1, characterized in that: The solid phase outlet of the first filter is connected to a first washing tank via a pipeline, the inlet of the first washing tank is connected to a third deionized water tank via a pipeline, and the outlet of the first washing tank is connected to the first dryer via a pipeline.

4. The modification device for carbon black used in the production of high thermal conductivity rubber as described in claim 1, characterized in that: The outlet of the carbon black tank is connected to a dispersion tank via a pipeline. The inlet of the dispersion tank is connected to a fourth deionized water tank via a pipeline. The outlet of the dispersion tank is connected to a pretreatment tank via a pipeline. The inlet of the pretreatment tank is connected to a pomegranate peel extract solution tank and an H2O2 solution tank via pipelines. The outlet of the pretreatment tank is connected to a centrifuge via a pipeline. The solid phase outlet of the centrifuge is connected to the pretreatment carbon black tank via a pipeline. The outlet of the pretreatment carbon black tank is connected to the reaction vessel via a pipeline.

5. The device for modifying carbon black for producing high thermal conductive rubber according to claim 4, characterized in that: The solid phase outlet of the centrifuge is connected to a second dryer via a pipeline, and the outlet of the second dryer is connected to the pretreated carbon black tank via a pipeline.

6. The device for modifying carbon black for producing high thermal conductive rubber according to claim 5, characterized in that: The solid phase outlet of the centrifuge is connected to a second washing tank via a pipe. The inlet of the second washing tank is connected to a fifth deionized water tank via a pipe. The outlet of the second washing tank is connected to the second dryer via a pipe.

7. The device for modifying carbon black for producing high thermal conductive rubber according to claim 4, characterized in that: The inlet of the pomegranate peel extract solution tank is connected to a pomegranate peel powder tank and an ethanol aqueous solution tank via pipes. The outlet of the pomegranate peel extract solution tank is connected to a second filter via a pipe. The liquid phase outlet of the second filter is connected to a concentration tank via a pipe. The outlet of the concentration tank is connected to the pretreatment tank via a pipe.

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